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Flashcards in Muscles of the Arm Deck (51):
1

Part of body that extends from shoulder to the elbow

Arm

2

The two groups of muscles that cause movement at the elbow joint

Anterior Flexors
Posterior Extensors

3

Name the three anterior arm muscles

Biceps Brachii (long and short head)
Brachialis
Brachioradialis

4

Anterior muscle of the arm that has two bellys, long and short, and two different origins with a common insertion

Biceps Brachii

5

Which muscle of the biceps brachii is lateral?

Long head

6

What are the actions of the biceps brachii?

Flexes forearm
Primary supinator against resistance like tightening a screw

7

Biceps brachii that is medial and has a tendon attached to the corocoid process of the scapula that is often fused with the corachobrachialis

Short head

8

Muscle of biceps brachii that has a rounded chord like tendon that crosses the shoulder joint within the capsule of the shoulder

Held in place by the transverse humeral ligament

Long head of the bicep

9

The distal tendon of the biceps attaches to what structure?

What does it become after it continues after that point?

The radial tuberosity

It continues on to become the bicipital aponeurosis

10

A fibrous sheet or expanded tendon that serves as a muscle attachment along the medial aspect of the proximal part of the forearm

Bicipital aponeurosis

11

An area on the anterior surface of the elbow joint that is protected by the bicipital aponeurosis (veins lie superior to it for veinipuncture)

Cubital fossa

12

Where the long head of the bicep originates

Scapula at supraglenoid tubercle

13

When this tendon is torn, it results in a muscle bulge on the anterior of the arm known as the popeye deformity

Long head of the bicep

14

Nerve that innervates both of the muscles of the biceps brachii

musculocutaneous nerve from the

15

Biceps brachii are involved in which two types of movement?

Flexion and supination

16

The long head of the bicep has the ability to do what to the shoulder because it crosses the shoulder joint?

Flex the shoulder

17

Flattened muscle which lies deep to the biceps brachii

Brachialis

18

Where is the origin of the brachialis?

Insertion of the Deltoid (Deltoid tuberosity)

19

The brachialis is primarily responsible for what movement, particularly during slow movements?

Does it for both supinated and pronated positions unlike the biceps brachii.

Maintaining flexion of the forearm

20

Muscle that ALWAYS contracts during flexion of the elbow joint

Brachialis

21

What is the origin of the brachialis?

Coracoid process of the ulna

22

What nerve innervates the brachialis?

Musculocutaneous nerve

23

Arm muscle which may be considered part of the posterior forearm muscles that flexes the forearm, especially during quick movement

Brachioradialis

24

Does the brachioradialis cross the wrist joint? Can it cause wrist movement?

No and No

25

This muscle is active in rapid movements (flexion) of the forearm

Brachioradialis

26

The brachioradialis inserts where?

The styloid process of the radius

27

What is the origin of the brachioradialis?

Lateral supercondyle ridge.

28

What innervates the brachioradialis?

The radial nerve

29

The muscle that the musculocutaneous nerve goes through

Coracobrachialis

30

Nerve that hooks around the posterior aspect of the humerus towards the forearm

Radial nerve

31

The two posterior muscles of the arm

Triceps brachii (long, lateral, medial head)
Anconeus

32

Which muscle of the triceps brachii crosses the shoulder joint?

Long head

33

Part of triceps brachii that lies deep to the long head and lateral heads that is often hard to see without pushing aside the lateral head

Medial head

34

Lateral and medial heads of the tricep are separated by what structure?

The radial groove

35

What nerve runs in the radial groove?

The radial nerve

36

Group of muscles that is the main extensor of the elbow joint, and can aid in arm adduction

Triceps Brachii

37

The long head of the triceps brachii originates where?
The medial head of the triceps originates where?
The lateral head of the triceps originates where?

Infraglenoid tubercle
Posterior side of the humerus above radial groove
Below radial groove

38

Where do all the triceps brachii muscles insert?

Olecranon process of the ulna

39

What nerve innervates the triceps brachii?

Radial nerve

40

All extensors innervated by which nerve?

Radial nerve

41

The long head crosses the shoulder joint allowing it to aid in what movement?

Adduction

42

What muscle make up the triangular space?

What structure does it contain?

Teres minor, teres major, long head of the triceps brachii

Circumflex scapular artery

43

What muscle make up the quadrangular space?

Teres minor, teres major, long head and lateral head of the triceps brachii

44

What nerve runs through the quadrangular space?

Axillary nerve

45

What muscles make up the triangular interval?

Teres major, long and lateral heads of triceps brachii

46

What nerve lies deep in the triangular interval?

Radial nerve

47

Small triangular muscle on the posterior side of the elbow covered by a thick layer of deep fascia

Anconeus

48

What movement does the anconeus help with?

Extension of the forearm

49

Where does the anconeus originate?

Lateral condyle of the humerus

50

Where does the anconeus insert?

The olecranon process of the ulna

51

What innervates the anconeus?

The radial nerve